01 -
In a saucepan, gradually whisk the flour into the non-dairy milk until free of lumps. Place over medium-low heat and whisk constantly until thickened to a smooth paste.
02 -
Transfer the tangzhong to the bowl of a stand mixer fitted with a dough hook. Pour the cold non-dairy milk over the tangzhong to lower the temperature.
03 -
Add vanilla extract, sugar, salt, bread flour, and instant yeast. Mix until a rough dough forms. Knead with the dough hook at medium speed until smooth and stretchy, approximately 10 minutes.
04 -
Add softened vegan butter to the dough. Continue kneading for about 5 minutes, scraping down the bowl as needed, until the dough is elastic and no longer greasy.
05 -
Transfer the dough to a lightly oiled bowl. Cover and let rise in the refrigerator overnight or in a warm place for 1 to 2 hours, until doubled in size.
06 -
Heat the oven to 180°C (160°C fan). Cut the rhubarb into 7 cm pieces and arrange in a single layer in a roasting tin. Sprinkle with sugar and pour over orange juice. Roast for 10 minutes until softened but still holding shape. Set aside to cool.
07 -
Punch down the risen dough and knead briefly. Divide into 10 even pieces using a kitchen scale. Roll each piece into a ball.
08 -
Flatten each ball on a lightly floured surface to a 10 cm disc. Press the center further, leaving a 2 cm rim. Place spaced apart on two lined baking sheets.
09 -
Loosely cover the buns and let rise until puffy, about 30–45 minutes. The dough should spring back slowly when gently pressed.
10 -
Mix ground almonds, flour, cornflour, baking powder, and sugar in a bowl. Add melted butter, non-dairy milk, and almond extract. Whisk until just combined.
11 -
Spoon frangipane into the hollows of each bun and level the surface. Arrange roasted rhubarb pieces on top, reserving any juices.
12 -
Combine non-dairy milk and maple syrup, then brush onto exposed dough rims. Sprinkle with demerara sugar.
13 -
Bake in the preheated oven for 20–25 minutes until golden brown.
14 -
While baking, simmer the reserved rhubarb juices until slightly thickened. Remove from heat.
15 -
Transfer baked buns to a wire rack. Brush rhubarb topping with the reduced syrup and garnish with chopped pistachios if desired. Serve while fresh.